var roomsLiveStates = [Firebase?]()
for ref in roomsLiveStates {
if ref != nil {
ref = nil
}
}
}
This doesn't seem to work.
You can just set each to nil
:
for index in 0 ..< roomsLiveStates.count {
roomsLiveStates[index] = nil
}
As The Swift Programming Language says in its Control Flow discussion of for
syntax:
This example prints the first few entries in the five-times-table:
for index in 1...5 { println("\(index) times 5 is \(index * 5)") }
... In the example above,
index
is a constant whose value is automatically set at the start of each iteration of the loop. As such, it does not have to be declared before it is used. It is implicitly declared simply by its inclusion in the loop declaration, without the need for alet
declaration keyword.
As this says, the index
is a constant. As such, you can not change its value.
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